Sphenoid bone(Anat.), an irregularly shaped bone in front of the occipital in the base of the skull of the higher vertebrates. It is composed of several fetal bones which become united the adult. See Alisphenoid, Basisphenoid, Orbitosphenoid, Presphenoid.

Sphenoid
(Sphe"noid) n.

1. (Crystallog.) A wedge-shaped crystal bounded by four equal isosceles triangles. It is the hemihedral form of a square pyramid.

2. (Anat.) The sphenoid bone.

Sphenoidal
(Sphe*noid"al) a.

1. Sphenoid.

2. (Crystalloq.) Pertaining to, or resembling, a sphenoid.

Sphenotic
(Sphe*not"ic) a. [Spheno- + the ear.] (Anat.) Of, pertaining to, or designating, the sphenotic bone.

Sphenotic bone(Anat.), a bone on the anterior side of the auditory capsule of many fishes, and connected with, or adjoining, the sphenoid bone.

Sphenotic
(Sphe*not"ic), n. (Anat.) The sphenotic bone.

Sphenographist
(Sphe*nog"ra*phist) n. A sphenographer.

Sphenography
(Sphe*nog"ra*phy) n. [Gr. sfh`n a wedge + -graphy.] The art of writing in cuneiform characters, or of deciphering inscriptions made in such characters.

Sphenoid
(Sphe"noid) a. [Gr. sfh`n a wedge + e'i^dos form: cf. F. sphénoïde.]

1. Wedge-shaped; as, a sphenoid crystal.

2. (Anat.) Of or pertaining to the sphenoid bone.


  By PanEris using Melati.

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